Doorcheck



Sept. 23 1924.

1,509,780 N. A. ROBERTSON DOORCHECK Filed sept. 4. 1923 Patented Sept. 23, 1924.

l UNITED STATES NEILL A. ROBERTSON,

OF GARFIELD, MAINE.

DOORGHECK.

Application led September 4, 1923. Serial No. 660,834.

T o all whom it may concern Be it known that I, NEILL A. ROBERTSON, a citizen of the United States, residing at Oakfield, county of Aroostook, State of Maine, have invented certain new and useful Improvements in Doorchecks; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention pertains to a novel door check and consists of improvements on the device shown in my United States Patent No. 1,493,794 of May 13, 1924.

The patented device includes a catch cari ried by the door and akeeper connected to a stationary object such as a wall or floor. As the door is moved towards open position, the catch is received in the keeper and l retained thereby. Further movement of the door in the same direction, that is towards open position, permits the catch to be released.

The present invention consists of improvements on this device whereby the door cannot accidentally be moved further in the direction of opening to release the keeper. TO this end, there is provided with the catch a bumper under spring pressure and engaging the keeper when the catch is held. In Order to release the catch from the keeper, pressure on the door is required to overcome the pressure of the bumper.

The bumper also engages the keeper prior to the entrance of the catch therein. In or der that the catch be permitted to enter the retaining portion of the keeper, a pressure is required to counteract the bumper. This requirement overcomes the possibility of locking the door Open by an insulicient pull thereon.

The invention is fully disclosed in the following description and in the accompanying drawings in which:-

Figure 1 is a perspective view of the part ap lied to the door;

igure 2 is a perspective view of the keeper to be secured to the floor;

Flgure 3 is a horizontal section of the device in locked position;

Figure 4 is a vertical section thereof;

Figure 5 is a section corresponding to Figure 3, showin the catch about to be released from the eeper;

Figure 6 is a similar section illustrating another stage of the release operationg'and,

Figure 7 is a perspective view of a modified form of keeper adapted to be secured to a wall or the like.

Reference will now be had to these views by means of like characters which are employed to designate corresponding parts throughout.

In these views the numeral 1 indicates a door to which is secured a bracket 2. The bracket includes a top plate 3 and bottom plate 4 connected at their ends by side members 5. Between the plates is pivoted a catch comprising an arm 6 and finger 7, this member being adapted to swing by reason of its connection to thev plates by the'pin 8. From the lower plate 4 extends a tubular member 9 having an apertured rear wall 10. A rod 11 is passed through the apertured wall and tube, and is prevented from slipping through the wall by means of the stop 12 at its rear end. The forward end of the rod carries a bumper or head 13 preferably formed off the same material as the rod. A coil spring 14 contained within the tube and surrounding the vrod bears against the head and wall 10 whereby the head is under Outward pressure.

To the floor 15 isA secured a keeper consisting substantially of an angle piece 16 having a top' 17 and bottom flanges 18 'for attachment. On the lower face of the top is formed a hook member 19 having an inclined bearing surface 2O which is exposed to and is engaged by the finger 7 when the door is opened. The hook proper comprises an outer lip 21 and the inner lip 22 -between which is formed the bend of the hook for receiving the finger as illustrated in Figure 3. At a point behind the bend, the top is formed on its lower face with a projection or guard 23 pointing towards the inner lip 22. The function of this mem,- ber is described below.

In a construction where the door opens directly against a wall, the modification shown in Figure 7 may be employed. This form comprises a plate 24 having suitable openings 25 for attachment to a wall so that the plate lies in a vertical plane. From the upper edge of the plate extends al horizontal top 17 on the lower surface of which are formed a hook 19 and guard 23 which function in the same manner as the corresponding members already described. The hook 19 comprises a bearing surface 20', an outer lip 21 and a lower lip 22 similar to the construction shown in Figure 3.

When the door is swung towards the keeper, the head 1,3 engages the latter and the finger 7 engages the inclined surface 20 as shown in dotted lines in Figure 21. In order to. bring the finger further within the keeper, a pressure on the door is required to overcome the action of the spring 14. In this manner, the bum er device serves to prevent unintended locking of the finger in the hook. When the required pressure is applied, the finger passes over the lip 21 in the direction of the guard 23. This member, being directed towards the inner edge of the lip 22, deflects the finger into the bend of the hook and thus prevents itfrom clearing the lip 22 and passing out of the keeper.

In releasing the finger from the hook, a further inward movement of the door is reuired in order to bring the finger around t e lip 22. In this operation, there is required a pressure suiiicient to overcome the expansion tendency of the spring 14. This required pressure prevents the finger from becoming disengaged from the hook vby merely a slight displacement of the door, such as that caused by vpersons brushing against it when passing through the door way. After the finger has cleared the lip 22, the bumper spring starts the door towards closed position, whereby the finger takes the position shown in Figure 6. The door is now released from the keeper and may be closed in the usual manner. The arm 6 is normally retained perpendicular to the bracket 2' by means of the fiat spring 26 engaging the rear end thereof and bearing against the rear wall of the bracket.

While specific embodiments of the invention have been illustrated and described, it is to be understood that various alterations in thedetails of construction may be made without departing from the spirit of the invention as indicated by the appended claims.

Having thus fully described the invention, what I claim as new and desire to pro- Letters Patent is door check comprising a catch adapted for pivotal attachment to a door, a spring for holding said catch at a constant angle to the door, a keeper adapted for attachment to a stationary object, said keeper comprising a plate, a pair of lips carried by said plate and forming a hook for receiving the catch, vsaid lips 4being spaced from the stationary object to permit the catch to pass freely around the same, one of said lips presenting a bearing surface to the catch to guide the same into the hook, and a sprin pressed bumper carried with the catch and' adapted to engage said keeper.

2. A door check comprising a catch adapted for pivotal attachment to a door, a spring for holding said catch at a constant angle to the door, a keeper adapted for attachment to a stationary o ject, said keeper comprising a plate, a pair of lips carried by the plate and forming a hook for receiving the catch, said lips `being spaced from the stationary object to permit the catch to pass freely around the same, one of said lips presenting a bearing surface to the catch to guide the' same into the hook, a guard carried by the plate and pointing towards the hook for guiding the catch into the latter, said guard being spaced from the lips to permit passage of the hook between it and the lips, and a spring pressed bumper carried iwith the catch and adapted to engage said keeper.

In witness whereof I have hereunto set my hand.

NEILL A. ROBERTSON. 

